What a year it's been for pop—from "Blurred Lines" to "Roar" to "Timber", we've seen nine songs top the Hot 25 this year that has had a hint of pop in it. Here's a sneak peak of the 'Pop' field at the 56th GRAMMYs.

Justin Timberlake's comeback is arguably one of the most impressive the music industry has seen in a long time. He took the stage at last year's GRAMMYs with Jay Z—the duo performed "Suit & Tie" and "Pusher Love Girl" to promote The 20/20 Experience, being released a month later. Both The 20/20 Experience and it's re-release 2 of 2 topped the Billboard 200, and 2 of 2 crowned the BenBoard 10 for two weeks.

Bruno MarsRecord of the Year, Song of the Year, Best Pop Solo Performance, Best Pop Vocal Album

Bruno Mars' hits have taken over the charts since his debut back in 2011. He has been nominated for Record of the Year at three out of the four years he's been nominated at the GRAMMYs, and has also snagged several Song and Album of the Year nods.

Katy PerrySong of the Year, Best Pop Solo Performance

At every GRAMMY Awards since 2009, Katy Perry has been nominated; but surprisingly has not won a single award. Perry has been up for Album of the Year (for Teenage Dream) in the past, and is nominated for Song of the Year this year (for "Roar"). We're keeping our fingers crossed that she will take home her first GRAMMY on Sunday!

Robin ThickeRecord of the Year, Best Pop Duo/Group Performance, Best Pop Vocal Album

"Blurred Lines" was undoubtedly the song of 2013, so it scored a ROTY nomination without a doubt. The song is also up for Best Pop Duo/Group Performance, and the album is up for Best Pop Vocal Album. These are his first solo GRAMMY nominations, and he is also performing on the show.